Error code -22 – How to Repair Mac error code 22

As with most Mac errors, error code -22 can leave you scratching your head in confusion and/or ripping out what little hair you have left. Error code -22 (Driver ref num specifies NIL handle in unit table) can unfortunately be caused by a variety of different things.  Some of the main reasons for error code -22 popping up are (in no particular order):

  • Catalog file corruption
  • Corrupted system files
  • Hard drive failure
  • Faulty or corrupted drivers (the most likely culprate)
  • Viruses (this is rare but not un-heard of)


How to fix Error code -22 (Driver ref num specifies NIL handle in unit table): The quickest easiest way to repair error code -22 is to download and run a scan with the program we have included below. This award winning software will, in most cases, clear up error 22 and 99% of other errors you have on your computer, while also giving your computer a speed boost and protecting it against viruses.

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Fix error code -22